The car is Mustang 2013" with Edelbrock SC attached, it runs just fine under heavy loads, but have very strange issue with very light loads, sometimes if i press the pedal very slow up to 15-20% , TB dont reacts at all and stays in full close position... please advise what can affect that?
please see the log below:

https://i.gyazo.com/b6ab49dbbc130b7f...f72f4dda3c.png